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Amiga computer related discussion => Amiga Hardware Issues and discussion => Topic started by: Jeff on May 18, 2008, 07:46:00 PM

Title: BPPC closeup photo question
Post by: Jeff on May 18, 2008, 07:46:00 PM

Just for the sake of curiosity what were the surface mount pads used for surrounding the BPPC's 603 CPU in a square formation? You can see them clearly in the photo below with the heatsink removed.
BPPC Closeup (http://www.acube-systems.biz/common/603e-reworked-closeup-2_small.jpg)

-Jeff

Title: Re: BPPC closeup photo question
Post by: Piru on May 18, 2008, 08:16:30 PM

603 is available in different packaging, BGA (http://en.wikipedia.org/wiki/Ball_grid_array) and QFP (http://en.wikipedia.org/wiki/QFP). Those pads are for the 603 QFP CPU.

Here's a picture of the QFP 603:
http://www.cpu-world.com/CPUs/PowerPC-603/L_IBM-PPC603evFB200r.jpg

Title: Re: BPPC closeup photo question
Post by: Jeff on May 18, 2008, 08:25:21 PM

Wouldn't it be easier then to refit the boards with the QFP version instead of the BGA version? I could probably even manage to solder the QFP version myself. I wouldn't even think of trying BGA work after all I have read about the special equipment needed.

A quick search also turns up QFP sockets and adapters. Not that I would ever try and modify a perfectly working board, just thinking out loud.

Thanks for the reply Piru.

-Jeff

Title: Re: BPPC closeup photo question
Post by: Piru on May 18, 2008, 08:37:15 PM

As far as I know 603 is only available as BGA these days (at least the newer, faster models).

Title: Re: BPPC closeup photo question
Post by: delshay on May 19, 2008, 01:12:30 AM

i think 603 QFP only went as high as 240Mhz.